Signal transfer and power delivery system for a television...

H - Electricity – 04 – N

Patent

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Details

H04N 5/30 (2006.01) H04H 60/04 (2009.01) H04B 3/54 (2006.01) H04H 7/00 (2006.01)

Patent

CA 2133575

A television production system (12) provides both signaling and power aver a single coaxial cable (30) between a television control station (14) and a remote camera station (16). The control station (14) includes a power delivery unit (34) for coupling with the coaxial cable (30) for delivering D.C, voltage and current along with signaling over the coaxial cable (30). The camera station (16) includes a power receiving unit (76) which receives power from the coaxial cable (30) and delivers it to the television camera (18) and other camera station equipment (18, 20, 22, 24). The receiving unit (76) also monitors the received voltage and provides a power status signal representative thereof over the cable (30) to the power delivery unit (34). The delivery unit (34) controls the delivered voltage in accordance with the status signal in order to maintain the received voltage at the camera station (16) at a desired level in order to compensate for cable voltage drop.

L'invention concerne un système de production de télévision (12) qui produit la signalisation et l'alimentation sur un seul câble coaxial (30) entre une station de télévision pilote (14) et une station de caméra à distance (16). Ladite station pilote (14) se compose d'un bloc d'alimentation (34) couplé au câble coaxial (30) qui fournit une tension et un courant continus simultanément avec la signalisation sur ledit câble coaxial (30). La station de caméra (16) comprend un bloc d'arrivée électrique (76) qui reçoit la tension provenant du câble coaxial (30) et l'envoie à la caméra de télévision (18) et aux autres équipements de la station de caméra (18, 20, 22, 24). L'unité d'arrivée électrique (76) contrôle également la tension reçue et envoie un signal d'état représentatif de la tension par l'intermédiaire du câble (30) au bloc d'alimentation (34). Le bloc d'alimentation (34) régule la tension délivrée en fonction du signal d'état afin de maintenir la tension reçue par la station de caméra (16) à un niveau désiré, et compenser les chutes de tension dans les câbles.

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